Answer:
cross bridge formation, power stroke, cross bridge dissociation, cocking of myosin
Explanation:
The signal for the beginning of muscle contraction is acetylcholine (Ach) released from the presynaptic cell which then binds to its receptor on the muscle cell. This event causes depolarization and consequently the release of Ca ions from the sarcoplasmic reticulum. Ca helps the formation of actin-myosin cross bridge. The movement of myosin heads causes the move of actin and this process is called power stroke. In the absence of ATP, the myosin head will not detach from actin(ATP binding causes the myosin head to detach from the actin and causes cross bridge dissociation). Energy released form the ATP hydrolysis changes the myosin head into a cocked position.
C, cytoplasm. It is the jelly-like substance
Answer:
The thrust of the air propels the balloon in the opposite direction
Explanation:
Answer:
Reptiles
Explanation:
I asked and it had a similar questionnaire and the only answer that it has in common was reptiles so that's what I would go for.
A culture of bacteiral cells are spread on a petri plate of complete medium. Both prototrophs and auxotrophs grow on the medium and their colonies appear in a random arrangement. Piece of sterilized velvet is pressed on this plate of colonies, and the velvet pickus up some cells form each colony. The velvet can then be pressed on a number of petri plates, whcih reproduces the same pattern of bacterial colonies. One of these replica plates contains minimal media, and each of the remaining replica plates contain minimal medium supplemented with a different compound. A cplony that grows on minimal media represents a protoroph, whereas a colony tha fails to grow on minimal medium represents an auxotroph.REPLICA PLATING CONTINUED<span>An autotroph that grows on a supplemented minimal medium plate is unable to synthesize either the supplemented compound or a precursor to that compound. the indiviulal clonies of interest can then be isolated and grown out.
hope that helps
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